Lindows aka Linspire 5, oh how I hate that OS, I mean it was never completed properly, buggy and down right unstable. I suppose charging for the whole "click and run" thing didn't help.

How can I forget Windows ME, I thought it was the most, uselss, unstable piece of cr@p that Microsoft ever came out with. Kept on crashing for no damn reason, although I must be grateful some of Windows ME's (decent inovations) went into XP.